Liquid cooled muffler



2 SHEETS-SHEET l Filed NOV. 28, 1949 K l .C 3 0 RE 4 f d M m@ Y 0.00. M 4ff 2 MM n. \||||n0 HH n 3 3 4 n 3 f du L 2 5 5 z j? /M n MM \M 8 x 9 1/0 l/l n C l 2 d d 00000000060000000 HHHHHHU u Il 00000 oooooo 000.00 0 0 Mmwmwomww 0 2 f 2 f Y0 0 0 0 0 0 0 0 0 0 0 00 00 0 3 09M M0 M 3 M um 3 M 0W fw Sept. 30, 1952 K. w. scHRl-:ECK M2235 LIQUID cooLED MUFFLER Filed Nov. 28, 1949 2 SHEETS- SHEET 2 ,.llllmllll mlmlllllllllk BY M t In ,the drawings:

y y QUHIMUEFLER I 'l' f applicati@ N'yiember es, iaiaiseriafmt; 129,785y f siennes; (01.181552),

Thisinvention relates. .broadlyH to vmullerslifor internalcombustion engines and'more-speciil'cally to*` improvements inmufers of the typefthatA are designed to restrain vthe discharge of. incandescent products of combustion;

There are numerous environs in which theoperationy of amotor vehicle is extremely. dangerous unless` provisionis made to safeguardlthe electric 4system andzquench the. sparks: customarilysemittedfroin the exhaust pipe leading-from the muffler, .Flour andcottonfmills, oil refineries, andI sea `board loadingwdockszare. illustrativev of' ai few. of

many.A enterprises. that' have prohibited the .use of motorized material-handling equipment; .inathe hazardouszone of theirV activities.. e

. The;l present invention; contemplates a;.muiler which. is constructed to .eliminatev` the.4 emission of sparks and flames .therefromhy (1)' passing the exhaust gas through atortuouspathina heat exchanger to lower the 1temperaturethereof',v L(2) d-eectingthe gaswand cinders upon. the; surface of a' aafluid in ...the vmufller.I to quench; the.- llameior spa/rkszentrained therein, (3)- passing the gas through: aspark.; 'arrester'.to .separateY or screen thesolids. therefrom, andz(4) condensing the vaporcus exhaust. before dischargingl the gasto y' atmosphere.

In addition' to, the4 f oregoingiobj'ectsthe invention further'comprehends astructureuwhichis light inpwelght .economics of manufacture, efficient-@of operation, andi capable ofy use'.V Without renewal of the iiuld therein Yover relativelylong perodsof continuous operation. x

. Other; objects andi advantages; more: less ancillary f' to the foregoing; and. the manner in which; all jthe various objects. are realized will appear lin the following description, which, consideredihinV connectionwith the accompanying drarvinga sets forth the preferred. embodiment of the. ysection being taken,v on aplane indicatedfiby Fig... 4 is.-v a. horizontal sectional Lvievvf through the. muiilen the section being Ytaken ont a plan-e indicatedbythelineAfHnFig;l;f

y Fig..V 5.A is a .i diagrammatic view;- of the fmproved 'muffler coupled AWith theradiator inthe-.vehicle l.Referring rstto Fig. 1, the' muffler-chosen herein 1 forpu1:pose1 off illustration i comprises, a 'tank I0 of elliptic transverse section having verlthe endvr plates `flanges' 33 toxaccommodatef thev support thereof ticalparttionsl II and I2: adjacent the AenrlWvva-lls I3I thereoflfdeiining` respectively 'an intake expansionrc'hamber I4, a 4fluid reservoir I5',l ancha dislchargeexpansion chamber ISL The intake-chanvber is provided with a conduitzII. having the lower end thereof welded or-` otherwise affixed to a bossi I 8l` pressed inf--thecentral portion ofthe partition-lili The upper end ofthe. tube iszsup.- ported lby alnifpple lgfmounted inthe: tankiwith the free endthereof'threaded-for the' reception of the lpipe from the-engine-'eXh'aust manifold. The conduit is formedL with an endclosure 2D, and-the` maior portion of the `.sid-"e wallthereof is perforated with relativelyl smallzopenings 2l. The intake and discharge chambers .are-inter.- connected througli one ormore tubes v221m'ounted inthe lowerportionsofthepartitions II andsIZ in fluid-tight" relation With-thevreservoir I5;` The upper Aend of the wall I2 -is pierced: and` fo'rmedto provide a rectangular opening.y 2'3 and an angularly disposed depending` -biafflek 2&1' oni the ainner facethereof. TheI upper 'f portion ofv the tanki .is

Yprovided Withatube orpipe25 which'lconstitutes the discharge-passageway in. themuler.; The tube is supported by a pi1ot-boss126 pressedin'thc wall IIS, 'a.flanged-openirig-ZA iii-therWalllZgancl tubeadj acent` the intake. zchambertxis closed' .byfa capl 291. and theupperfthirdof ,the Wall ,of a sub'- stantia'l. portion (of thei sameiendthereof is; perforated with relatively: small .,holes; .30 or may :be formediwith slots or screened openingsnto restrain the. entry of solid and liquidv bodies and permit the egress yof thevogas. Thefreefencl'of `the nipple 28 is threaded to'receivean exhaust pipe (notshown), orr a condenser illustrated `in Fig. 5. The central portionof'l the reservoir I5 .iszprovided Witha verticallyrdisposed Wa'llvSI Iconstituting-a baffle to dampen the surging action of the fluid within therchamber when the yvehicle isiin' motion; The Wall- 3 I is formed vwith vvclearance; openings 1.32 A'for :the tubes.- 22. and' 25 and this`- wall las Well; as the partitonsbll and; I2: and I3 are formed withimarginal and reinforce the assembly. v ,l

Thequpper Wall of` the reservoir adjacent the discharge. chamber is :provided with. a fllerneck 34 having acapg-35 threaded thereon andthe lower portions ofthe-walls yI I tand -I3 are-fabricated forl the supportiof a drain pipe 36.y The drain pipe as illustrated .in Fig. 1 is threaded for the reception cfa capL 31 and the inner end thereof is preferablyv provided.` with aA collary 38@ which ils welded to the plate I I.

to minimize the lateral strains imposed on the cradles or brackets 39.

In practice it has been found that the improved muiiier may be operated from four to eight hours before it is necessary to refill the reservoiry I5 and f that such operative periods may be extended by coupling a condenser 42 (Fig. 5) of any conventional form with the gas discharge outlet and draining the condensate back into the liquid reservoir. Further economies of the coolant may be realized by adding a material to the, water in the reservoir which will raise the boiling point thereof, for example, an admixture of water with one of the glycols.

In the embodiment illustrated in Fig. 5 the drain pipe 36 is coupledthrough a conduit 5i) to the engine water pumpL 5I and an overflow line 52 is mounted in the side wall of the reservoir at a point slightly below the lower edge of the rectangular opening 23 in the partition I2. The line 52 is coupled with the radiator inlet 53, and, if desired, a valve 54 may be interposed in the line `50 to control the flow of Water or other coolant circulated by the pump 5 I.

In operation, the gases discharged. from the engine will enter the conduit I1, pass through the openings 2l in the side wall thereof, enter the expansion chamber I4, then iiow through the tubes 22 in the coolant reservoir and into the second expansion chamber I6. The gases will then pass through the opening 23, and over the face of the baille 24, which Will eifect'the deflection thereof over the surface of the water in the reservoir I5. Should any incandescent particles of carbon remain 'ingthevgases after the translation thereof .through the tubes 22,V such heated particles or vsparks -will be quenched since the wall 3I will arrest the flight thereof save through the upper opening32 in the wall 3 I, which, it .will

be noted, is disposed above the lower edge of the baille 24. After the gases pass through the opening 32 they Will enter the apertures 30 in the upper face of the tube 25 and be discharged through the exhaust pipe.

i Fromthe foregoing it Will be recognized that an effective silencing action will be produced as the gases passthrough the several expansion chambers and the-tortuous path formed by the conduits associated therewith; that the gases will be appreciably cooled while passing through the chamber I4, the tubes 22, and the chamber I6;

that the sparks entrained in the stream of the gases entering the reservoir will be' entrapped therein and brought into impinged relation with intended to be restrictive or confining, and that various rearrangements of parts and modifications of detail may be resorted to without departing from the scope or spirit of the invention as herein claimed.

I claim: l

1. A liquid muler for the exhaust gases of an internal combustion engine comprising a closed vessel, Ma partition adjacent each end thereof delining respectively an inlet chamber, a liquid vessel, and an outlet Achamber communicating with the upper portion of said vessel, a conduit in the lower portion of said vessel connecting said inlet and outlet chambers, liquid partially iilling said vessel, said liquid constituting a coolant for the exhaust gases passing through the inlet chamber, said conduit, and said outlet chamber, and further constituting a quenching medium for'sparks passing into said vessel, and a discharge tube in said vessel above the liquid level, saidv tube extending through and protruding kbeyond theouter wall of said outlet chamber and having `a perforate side wall in the portion thereof whichl is disposed within the vessel.

2. A muler for the exhaust gas from an nternal combustion engine ,comprising a. closed liquid tank, double walls in the opposed-lends thereof defining gas expansion chambers, animperforate tube in said tank connecting thelower portions of said chambers, a gas inlet inthe top of one ofsaid chambers, an outlet in the top of the other chamber communicating with said tank, a perforated outletpipeleading from the vtop of said tank to and through said outletchamber whereby the exhaust gas is cooledras itpasses through. the chamber and interconnecting tube and is further cooled as it passes-over the surface of the liquid in said tank. f y

3. A muiller comprising a liquid tank having opposed-double end walls defining gas inlet and outlet chambers and a central liquid vessel, a conduitconnecting said chambers and extending through said vessel near the bottoznthereof, a gasinlet tube in one of said chambers, an outlet in the other chamber leading into said vessel `near the top. thereof,.baiile plates in said vessel to arrest the movement of sparks thereilrand a perforated. outlet pipe near the top of said vessel leading through said outlet chamber. 4

4. A combined. muiiienftheat exchanger, and

'spark arrester for 'anfinternalfcombustion engine comprising. 'a closed tank.' a partition at each end thereof defining gas inlet and outlet chambers and a` central liquid reservoir, a perforated gas `inlet conduit having a closed endV depending to the center of said inlet chamber, an imperforate tube adjacent the lower portion of saidrreservoir interconnecting saidV chambers, anop'ening adjacent the'top of the partition for ('said outlet chamber interconnecting the o utletchamber with the liquid reservoir, a baille in lsaidvres'ervoir above said opening vfor deiiecting exhaust gases downwardly into the reservoir, a gas discharge tube in the upperportion of said reservoir extendin'g'Athrough said outlet chamberf-'said tube having a' perforated side Wallin the portion thereof within the reservoir. f5. A.- combined muffler, -heat"e'xchanger, and spark arrester comprising a closed tank, a partition at each end thereof defining gas inlet and outlet chambers and a central liquid reservoir, liquid partially nlli'ngssaid reservoir, a 'gas inlet conduitextending into said inlet chamber, an imperrorate tube adjacent the lower portion of said 6 REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 887,988 Wakley May 19, 1903 1,106,532 Zaremba Aug. 11, 1914 1,240,440 Grikscheit Sept. 18, 1917 1,421,432 n Embanks July 4, 1922 1,524,333 Brandt et al Jan. 27, 1925 2,046,252 Davis June 30, 1936 2,144,725 Manning Jan. 24, 1939 

